基于性能的地震设计方法在ASCE 41新钢结构建筑的评估:特殊时刻框架
John Harris1, Matthew Speichera1
1National Institute of Standards and Technology, 100 Bureau Dr., Gaithersburg, MD 20899.
概括
根据当前的地震标准 (ASCE 7) 设计的建筑可能不符合较旧的建筑性能标准 (ASCE 41). 特殊的时刻框架很难满足对等新建筑性能的接受标准.
科学领域:
- 结构工程 结构工程
- 地震工程的工程是地震工程.
- 地震设计 - 地震设计
背景情况:
- 当前的地震设计规范 (ASCE 7) 旨在确保建筑物的安全.
- ASCE 41为现有建筑提供了分析程序和性能指标.
- 新的设计标准和现有的建筑评估标准之间可能存在差异.
研究的目的:
- 根据ASCE 7预期的地震性能与使用ASCE 41预测的性能之间的相关性.
- 评估是否以ASCE 7设计的特殊时刻框架的钢结构建筑符合ASCE 41对现有建筑物的接受标准.
- 确定抗震改装和性能评估的潜在挑战.
主要方法:
- 使用基于组件级性能的分析程序.
- 专注于防止崩的结构性绩效水平.
- 根据ASCE 41的接受标准,比较了符合ASCE 7标准的特殊时刻框架的设计结果.
主要成果:
- 分析结果表明,在满足ASCE 41认可标准方面存在挑战.
- 根据ASCE 7设计的特殊时刻框架显示,难以达到ASCE 41定义的目标性能水平.
- 该研究强调了新建筑地震标准和现有建筑评估之间的潜在差距.
结论:
- 根据ASCE 7设计的特殊时刻框架的钢结构建筑可能不符合现有结构的ASCE 41性能要求.
- 需要协调新建筑的地震设计规范和现有建筑的评估标准之间的差异.
- 可能需要进一步的研究来弥合性能差距并确保一致的地震安全.
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